bundy

Jinmei,

On Thu, 22 May 2014 23:37:41 -0700
JINMEI Tatuya / 神明達哉 <jinmei at wide.ad.jp> wrote:

> I've implemented almost all of the remaining TODOs from BIND 10 (plus
> something more) for supporting shared-memory (mmap) based zone data.
> Many of the changes will have to be reviewed, but I think it reaches a
> "production ready" (in some definition:-) state.  I've pushed the
> latest snapshot for feature review in the "shmem-preview" branch.  I
> plan to run it on my personal server.  If someone can also try it,
> that would be very much appreciated.
> 
> This feature includes:
> - multiple processes can now share the same mapped memory, reducing
>   the total memory footprint
> - faster startup: the persistent mapped file is just mmaped on
>   startup, then compared to the underlying data source to apply any
>   outstanding diffs (if it's a restart from a clean shutdown, there's
>   normally no need to apply diffs).
> - reconfiguration support: data source reconfiguration is handled in a
>   separate memory manager so the service of the authoritative server
>   isn't stopped or disrupted until the reconfiguration is fully
>   completed.
> - zone update support: diffs from incoming IXFR or DDNS are applied to
>   the mapped file by the separate memory manager and then remapped in
>   other processes.

This is of course awesome news. I'll be giving this a try this week.

Thanks!

--
Shane